A Combined Finite and Spectral Element Approach to Wave Scattering in a Cracked Beam: Modelling and Validation

Simon P. Shone; Brian R. Mace; Tim P. Waters

doi:10.4028/www.scientific.net/KEM.293-294.541

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 293-294A Combined Finite and Spectral Element Approach to...

A Combined Finite and Spectral Element Approach to Wave Scattering in a Cracked Beam: Modelling and Validation

Abstract:

This paper concerns flexural and axial wave motion in a cracked beam. A combined finite element (FE) and spectral element (SE) model of a cracked beam is presented. A portion of the beam, which contains the crack, is modelled using FE analysis and combined with semi-infinite SEs. From the combined model the reflection and transmission coefficients of the crack are estimated. To determine the accuracy of this approach, a beam with a mass discontinuity is considered in the first instance. The reflection coefficients are estimated numerically and compared with experimental results. Secondly, a slot-type transverse crack is cut along the width of the beam. The experimental results are compared with both an FE model and a conventional lumpedparameter spring model. The purpose of this work is to investigate further the use of audiofrequency wave propagation as a basis for crack assessment and provide a valid model to use in the development of an assessment procedure.

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Key Engineering Materials (Volumes 293-294)

Pages:

541-548

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.293-294.541

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Online since:

September 2005

Authors:

Simon P. Shone, Brian R. Mace, Tim P. Waters

Keywords:

Crack Modelling, Finite Element Analysis (FEA), Spectral Element Method (SEM), Wave Propagation

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References

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